Your ROOT_URL in app.ini is https://source.parasitstudio.de:63000/ but you are visiting https://source.parasitstudio.de/wirtz/OpenAudio_ArduinoLibrary/commits/commit/dba7ebd0c6e9f912702eeadc51b29a11878cc9ef/examples You should set ROOT_URL correctly, otherwise the web may not work correctly.